In ancient China, what was the official position of the person who reported to the emperor?

In ancient China, the person who reported the situation to the emperor was called Tong Quan, and its official name was set by Zhao Kuangyin, Song Taizu. The general judgment is that the emperor personally appointed the States to assist the counties to jointly govern the States. The chief judge can report the affairs of each state directly to the emperor. If a decree needs to be promulgated, it needs two people to sign it at the same time to take effect.